<template>
    <v-chart :forceFit="true" :height="height" :data="data" :padding="[20, 20, 95, 20]" :scale="scale">
        <v-tooltip></v-tooltip>
        <v-axis :dataKey="axis1Opts.dataKey" :line="axis1Opts.line" :tickLine="axis1Opts.tickLine" :grid="axis1Opts.grid"/>
        <v-axis :dataKey="axis2Opts.dataKey" :line="axis2Opts.line" :tickLine="axis2Opts.tickLine" :grid="axis2Opts.grid"/>
        <v-legend dataKey="user" marker="circle" :offset="30"/>
        <v-coord type="polar" radius="0.8"/>
        <v-line position="item*score" color="user" :size="2"/>
        <v-point position="item*score" color="user" :size="4" shape="circle"/>
    </v-chart>
</template>

<script>
const axis1Opts = {
  dataKey: 'item',
  line: null,
  tickLine: null,
  grid: {
    lineStyle: {
      lineDash: null
    },
    hideFirstLine: false
  }
}
const axis2Opts = {
  dataKey: 'score',
  line: null,
  tickLine: null,
  grid: {
    type: 'polygon',
    lineStyle: {
      lineDash: null
    }
  }
}

const scale = [
  {
    dataKey: 'score',
    min: 0,
    max: 100
  }, {
    dataKey: 'user',
    alias: '类型'
  }
]

const sourceData = [
  { item: '示例一', score: 40 },
  { item: '示例二', score: 20 },
  { item: '示例三', score: 67 },
  { item: '示例四', score: 43 },
  { item: '示例五', score: 90 }
]

export default {
  name: 'Radar',
  props: {
    height: {
      type: Number,
      default: 254
    },
    dataSource: {
      type: Array,
      default: () => []
    }
  },
  data() {
    return {
      axis1Opts,
      axis2Opts,
      scale,
      data: sourceData
    }
  },
  watch: {
    dataSource(newVal) {
      if (newVal.length === 0) {
        this.data = sourceData
      } else {
        this.data = newVal
      }
    }
  }
}
</script>

<style scoped>

</style>
